Annotation support for multiplied Nette components

BasePresenter.php

<?php

use Nette\Application\UI;
use Nette\Reflection\Method;


class BasePresenter extends UI\Presenter
{

	/** @var array datasets for Multipliers */
	private $datasets = array();



	/**
	 * Adds support for component factories
	 * with '@multiple' annotation marking usage
	 * of Nette\Application\UI\Multiplier
	 */
	protected function createComponent($name)
	{
		$method = 'createComponent' . $ucfirst($name);
		if (method_exists($this, $method) && Method::from($this, $method)->hasAnnotation('multiple')) {
			$presenter = $this;
			return new UI\Multiplier(function ($id) use ($presenter, $name) {
				$defaultArgs = array($presenter, $id);
				return call_user_func_array(array($presenter, $method), array_merge($defaultArgs, $presenter->getDataset($name));
			});
			# in PHP 5.4 factory for multiplied component can be protected
			# return new UI\Multiplier(function ($id) use ($name) {
			#	return $this->$method($this, $id, $this->getDataset($name));
			# });
		}
		return parent::createComponent($name);
	}



	/**
	 * Returns dataset with given name
	 * (dataset factory can be protected)
	 *
	 * @return mixed|array
	 */
	public function getDataset($name)
	{
		if (!array_key_exists($name, $this->datasets))
		{
			$this->datasets[$name] = method_exists($this, "createDataset$name") ? call_user_func(array($this, "createDataset$name")) : array();
		}
		return $this->datasets[$name];
	}

}

Foo.default.latte

{block content}

<ul n:if="$control->getDataset('likeIt')">
	<li n:foreach="$control->getDataset('likeIt') as $post">
		{control likeIt-$post->id}
	</li>
</ul>

{/block}

FooPresenter.php

<?php

class FooPresenter extends BasePresenter
{

	/**
	 * Factory for LikeItControl
	 *
	 * @multiple
	 * @param  int    id of post
	 * @param  array  associative array of posts
	 * @return LikeItControl
	 */
	public function createComponentLikeIt($id, array $posts)
	{
		return new LikeItControl($posts[$id]);
	}



	/**
	 * Creates dataset for LikeItControl
	 *
	 * @return array associative array of posts
	 */
	protected function createDatasetLikeIt()
	{
		return array($this->context->model->getPosts()->fetchAssoc('id'));
	}

}